.img{
  position: fixed;
  left: 10px;
  top: 20px;
  width: 70px;
  height: 70px;
  z-index: 500;
  background: url("../../assets/img/btnBg.png");
  background-size: 100%;
  img{
    width: 70px;
    height: 70px;
  }
}
